John Dehner

Captain Herrick

Sean McClory

Sheldon

Tudor Owen

Simon

Melville Cooper

Henry Wynch

Alan Mowbray

Sir Gilbert Talbot

Rhys Williams

Turnkey

Joan Elan

Charity Fell

Charles Davis

Apothecary

Ian Wolfe

Fell

Paul Cavanagh

Sir Edward Scott

Lillian Kemble-Cooper

Mrs. Fell

Isobel Elsom

Mrs. Bennett

Milton Parsons

Adam Urich

Lord Layton

Jacob Hall

Queenie Leonard

Apothecary's Wife

Owen McGiveney

Hoskins

Robert Dix

Husky

Michael Dugan

Husky

James Logan

Guard

Jimmy Aubrey

Little Man (uncredited)

Leonard Carey

Servant (uncredited)

Leslie Denison

Beadle (voice) (uncredited)

Ronald Green

Hired Swordsman (uncredited)

Peter Hansen

Sir Isaac Newton (uncredited)

Ramsay Hill

Lord (uncredited)

Charles Keane

Guard (uncredited)

Keith McConnell

Usher (uncredited)

John Monaghan

Shaddy (uncredited)

Matt Moore

Gentleman (uncredited)

Clive Morgan

Captain of Guards (uncredited)

Vesey O'Davoren

Courier (uncredited)

Gordon Richards

Courier (uncredited)

Lewis L. Russell

Gentleman (uncredited)

Gilchrist Stuart

Clerk (uncredited)

Trevor Ward

Perspiring Man (uncredited)

Trude Wyler

Celestine (uncredited)

Ashley Cowan